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		| Originally posted by wondash Weighing the jug and pennies would be a good method, but the jug is glass and I don't know how much it weights alone (I guess I'd have to empty it).
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 A 5-gallon glass carboy weighs 14 pounds:

and a 5-gallon water jug weighs 13 pounds:

and a roll of pennies weighs 4.5 ounces.